Our Collaboration

The spark detection and fire extinguishing system works faster than the explosion

Patro Resources is the collborative partner of Atexon Oy, Finland for Acia Pasific. Learn More about Atexon Oy. http://atexon.com/?lang=en
Download The White Papers here.
Our Products Portfolio as below.


Spark Detection System

The spark detection and fire extinguishing system works faster than the explosion

The spark detection and fire extinguishing system is designed to stop ignition sources from getting into dust explosion hazardous areas, such as silos and filters. Extremely fast and sensitive spark detectors detect ignition sources in a millisecond and start the water extinguishing. The extinguishing normally lasts for 5 seconds and stops automatically.
Our customers include companies that work in wood, bioenergy, recycling, paper, food, textile and fibre-reinforced plastic industries. Atexon products are ATEX certified by VTT Technical Research Centre of Finland Ltd. and they also conform CEA regulations.

Mounting principle of the spark detection and fire extinguishing system

1. The spark detectors detect the ignition sources in a millisecond.
2. The extinguishing unit extinguishes sparks and embers with a small amount of water.
3. The signal router guides and monitors the extinguishing event.
4. The VR18Z control panel monitors the whole system.
5. The signal device gives alarms using a siren and a strobe light.
6. The blower controller stops the blowers in case of overheating or a spark shower.
7. The overheat sensing cable monitors the blower bearings and the blower perimeter.
8. The pressure booster controller guides the water pump and the heat tracing cables
9. The pressure booster ensures airless extinguishing water with correct pressure.


Flame Detection System


Flame detectors are used in open and bright spaces for quick fire detection

The extensive type-approval, the AISI316L-casing and the versatile detecting techniques of the Atexon flame detectors makes it possible to use them in challenging industrial environments. Flame detectors can be either independent fire detectors, or a part of the fire prevention system. They can also be easily attached to the Atexon VR18Z spark detection and fire extinguishing system. In addition, the flame detector can control, for example, water mist fire extinguishers.
Typical uses include production facilities, fuel depots, machinery, unloading ports of conveyors, recycling plants and heating plants.


Atexon 3IR Detector

With Atexon 3IR Detector, you can get great detection sensitivity and excellent interference tolerance while ensuring the functioning of the device also in dirty and dusty environments. 3IR flame detector measures three different infrared frequency bands at the same time. In addition, the device uses mathematical algorithms to measure the flame's radiation spikes and flicker frequency to guarantee that the radiation source is really a flame and not, e.g., UV radiation from the Sun or other false sources.
A three-band infrared flame detector also works well in challenging environments. It is the best choice for monitoring dusty areas. Atexon flame detectors are made from acid-resisting steel (AISI316L) that allows reliable function also in corrosive environments.

Sensitive and fast

Atexon flame detectors are extremely sensitive. They can detect a flame the size of only 0.3 m from as far away as 60 m. Versatile adjustability in, e.g., detection lag and sensitivity makes it possible to use Atexon flame detectors also in places where traditional flame detectors would cause false alarms.

Versatile connections

It is easy to integrate Atexon flame detectors with, e.g., VR18Z spark detection system or with an already existing automation system. The versatile potential-free alarm relay outputs, Modbus and 4-20 mA power outlets make it possible to use the detectors in all industrial processes.

Extensive approvals

Industrial environments are often dirty and dusty. There might be ATEX classified zones inside the production areas that require equipment that is approved according to the ATEX directive. Atexon flame detectors have extensive international type approvals, such as ATEX, IECEx and FM, which ensure the performance of the device.

Carbon Monoxide and Smoke Detection

Bioenergy plants pose new kinds of challenges for fire prevention

Bioenergy plants often store large amounts of flammable fuels, which makes them difficult targets for fire prevention. For example, in pellet silos it can be very challenging to extinguish a fire with water due to the swelling of the fuel.
Atexon has fire-proofed several bioenergy plants by integrating different smoke and gas detection devices with spark detection systems. It is possible to build an easy-to-use fire prevention system with only one operating system and battery back-up.



In dusty silos, there are strict requirements for carbon monoxide and smoke detectors. Only with the right equipment you can guarantee a successful end result.

The ATEX zone classification creates challenges for equipment engineering. The gas that is being measured should have an unobstructed access into the electronics of the sensor, and the dust in the air should not interfere with the operation of the sensor. Atexon carbon monoxide detectors are ATEX-approved for Zone 20 with a wide temperature area. They are designed for the severe winters in Finland.
The carbon monoxide and smoke detectors are used for fire detection not only in silos but also in electrical facilities and cable tunnels.


Overheat Detection

As many as half of all the fires in industrial environments get started because of an overheated electrical equipment

In addition to detecting sparks, Atexon fire extinguishing equipment can also detect overheating in an electric motor. In mechanical wood industry, as many as half of all fires start in the exhaust units of sawdust removal systems.
We have successfully used Atexon overtemperature guards to secure exhaust units of sawdust removal, rotary feeders, screw feeders, and entire machine tool units.


Backfire Detection

The spark detection and fire extinguishing system works faster than the explosion

A backfire is an event where the fire moves from the fire box into the fuel transmission system and sometimes all the way into the fuel depot. The traditional way to prevent backfires is to use a heat-sensitive AVTA valve.
Atexon optic backfire detectors offer superior detection speed and sensitivity compared with heat-responsive fire extinguishing systems.

Mounting principle of the backfire detector

1. The backfire detector is mounted on a screw or a release point between two screws.
2. The fire extinguisher unit is mounted approx. 0.5 metres away from the backfire detector.
3. The screw control output of the backfire guard is attached to the boiler's automation system
4. The backfire guard has a 230Vac power supply
5. Depending on the case, a pressure increase station or at least a water tank is installed
6. The heat sensors of the backfire guard are mounted 0.5-1 metres away from the combustion head.
The backfire detection triggers the water extinguishing sequence that typically last for 10 seconds after the last detected spark. The extinguishing sequence will stop automatically. The temperature sensors measure the temperature of the combustion head and control the extinguishing unit with pulses if the temperature rises above 75 degrees. At 95 degrees, continuous extinguishing is triggered. The extinguishing sequence will stop when the temperature drops below 75 degrees.


Optic spark detection technology

Faster and more sensitive backfire detection with the optic spark detection technology. A fire box that does not burn properly causes vapours and flames to appear in the fire box. Sparks and heat from coal enter the feed screw and pass through heat sensors without being detected. Atexon backfire detectors detect sparks that fly by in a millisecond and extinguishes them with a small amount of water.
   - Optic spark detection technology
   - Optimised amount of water used for extinguishing
   - Battery back-up
Optional features include a GSM alarm, a pulse cooling feature, a screw control feature and a screw heat monitoring feature.